國際視頻編碼標準h.264avc分層結(jié)構(gòu)與算法研究

1、西安電子科技大學碩士學位論文國際視頻編碼標準H.264/AVC分層結(jié)構(gòu)與算法研究姓名：楊智勇申請學位級別：碩士專業(yè)：模式識別與智能系統(tǒng)指導(dǎo)教師：郭寶龍20050101Abstract Abstract The emerging H.264/AVC video coding standard was developed collaboratively by the ITU-T and ISO/IEC in order to adapt t

2、o the demands of developing advanced technologies and standardization in multimedia communications. By adopting a number of new coding techniques, H.264/AVC has achieved a significant improvement in compression performan

3、ce and a “network-friendly” video representation relative to existing standards. In this dissertation, the author firstly researches on the new techniques in H.264/AVC, emphatically on the following techniques: integer t

4、ransform, intra prediction, motion estimation and deblocking filter. Experimental results prove the technique advantage of the new characteristics comparing with the original algorithm. Secondly, hierarchical layer struc

5、ture is discussed. H.264/AVC introduces a series of concepts and sets up a hierarchical layer structure composing of video coding layer and network abstraction layer. The structure brings us the characteristics of networ

6、k adaptation and error resilience。 Finally, the author discusses a key technique in video coding standard: motion estimation. Based on the research of directional centre-biased motion vector distribution and predictive l

7、ine search ,a fast motion estimation algorithm is proposed―A Predictive Directional Diamond Fast Motion Estimation Algorithm （PDDFA） .Later, using adaptive search patterns and search policy according to various macrobloc

8、ks and adopting the second block type classification for predictive starting-point, another new fast motion estimation algorithm is given ― Directional Diamond-based Motion Vector Field Adaptive Search Technique(DDMVFAST